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Technology Stocks : Cyrix 1 / NSM 1 where hardware goes
CYRX 9.230+2.6%Oct 31 9:30 AM EST
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To: Jim McMannis who wrote (255)3/5/1998 4:27:00 PM
From: Joe NYC  Read Replies (1) of 300
 
Jom,

What are the ramafications of no SPD EPROM vs SPD EPROM?

Here is what netex says on their site:

tdl.com

Some of the Pentium II motherboards using the 440LX PCIset require an EPROM on the SDRAM DIMM module. For example, motherboards from Intel and Super Micro require this EPROM. Boards from AIR and ASUS do not require an EPROM. However, all boards will accept DIMM's with EPROM's. If an EPROM is present and it is not required, it will be
ignored by the motherboard BIOS. Pentium motherboards using the 430TX and 430VX chip sets do not require an EPROM. If it is present it will be ignored. It is always safe to buy DIMM's with EPROM's.

The EPROM is a small SPD (Serial present detection) chip made by National Semiconductor. When present and supported the EPROM will pass the specifications of the module to the motherboard BIOS so the motherboard BIOS can setup the timings properly. If your motherboard does not support the use of EPROM's you will have to set SDRAM settings by hand. This requires knowledge of the motherboard and SDRAM DIMM. You can start by setting CAS to RAS and Prefetch timings both to 3T and MA to slow. On boards that support the EPROM you can leave settings to auto-detect.

Joe
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